<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>計算器</title>
</head>
<body>
    <input type="text" id="s1">
    <select name="" id="s2">
        <option value="+">+</option>
        <option value="-">-</option>
        <option value="*">*</option>
        <option value="/">/</option>
    </select>
    <input type="text" value="" id="s3">
    <button value="=" id="s4">=</button>
    <input type="text" id="s5">
    
</body>
<script src="../JavaScript/计算器.js"></script>
</html>